Ab-initio-NEGF Fundamental Roadmap for Carbon-Nanotube and Two-Dimensional-Material MOSFETs at the Scaling and VDD Limit
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arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866911031701274624 |
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| author | Afzalian, Aryan |
| author_facet | Afzalian, Aryan |
| contents | Using accurate Hybrid-Functional DFT coupled with the Non-Equilibrium Green's function (NEGF) formalism, we explore and benchmark the fundamental scaling limits of CNT-FETs against Si and 2D-material MoS$_2$ and HfS$_2$ Nanosheets, highlighting their potential for gate length (L) and supply voltage (VDD) scaling down to 5 nm and to 0.5 V, respectively. The highest drive current is achieved by CNT-FETs with sub 1.3 nm diameters down to $L = 9$ nm and using VDD in the 0.45-0.5V range. Below $L = 9$ nm, however, the HfS$_2$ NS offers the best drive and could further scale down to $L = 5$ nm with a reduced VDD of 0.5 V. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_00599 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ab-initio-NEGF Fundamental Roadmap for Carbon-Nanotube and Two-Dimensional-Material MOSFETs at the Scaling and VDD Limit Afzalian, Aryan Mesoscale and Nanoscale Physics Applied Physics Using accurate Hybrid-Functional DFT coupled with the Non-Equilibrium Green's function (NEGF) formalism, we explore and benchmark the fundamental scaling limits of CNT-FETs against Si and 2D-material MoS$_2$ and HfS$_2$ Nanosheets, highlighting their potential for gate length (L) and supply voltage (VDD) scaling down to 5 nm and to 0.5 V, respectively. The highest drive current is achieved by CNT-FETs with sub 1.3 nm diameters down to $L = 9$ nm and using VDD in the 0.45-0.5V range. Below $L = 9$ nm, however, the HfS$_2$ NS offers the best drive and could further scale down to $L = 5$ nm with a reduced VDD of 0.5 V. |
| title | Ab-initio-NEGF Fundamental Roadmap for Carbon-Nanotube and Two-Dimensional-Material MOSFETs at the Scaling and VDD Limit |
| topic | Mesoscale and Nanoscale Physics Applied Physics |
| url | https://arxiv.org/abs/2507.00599 |